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1 /* |
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2 * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 package com.sun.tools.javadoc; |
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27 |
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28 import java.util.Locale; |
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29 import java.util.HashSet; |
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30 import java.text.Collator; |
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31 import java.text.BreakIterator; |
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32 |
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33 /** |
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34 * This class holds the information about locales. |
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35 * |
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36 * @since 1.4 |
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37 * @author Robert Field |
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38 */ |
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39 class DocLocale { |
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40 |
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41 /** |
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42 * The locale name will be set by Main, if option is provided on the |
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43 * command line. |
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44 */ |
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45 final String localeName; |
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46 |
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47 /** |
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48 * The locale to be used. If user doesen't provide this, |
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49 * then set it to default locale value. |
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50 */ |
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51 final Locale locale; |
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52 |
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53 /** |
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54 * The collator for this application. This is to take care of Locale |
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55 * Specific or Natural Language Text sorting. |
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56 */ |
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57 final Collator collator; |
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58 |
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59 /** |
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60 * Enclosing DocEnv |
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61 */ |
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62 private final DocEnv docenv; |
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63 |
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64 /** |
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65 * Sentence instance from the BreakIterator. |
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66 */ |
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67 private final BreakIterator sentenceBreaker; |
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68 |
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69 /** |
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70 * True is we should use <code>BreakIterator</code> |
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71 * to compute first sentence. |
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72 */ |
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73 private boolean useBreakIterator = false; |
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74 |
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75 /** |
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76 * The HTML sentence terminators. |
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77 */ |
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78 static final String[] sentenceTerminators = |
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79 { |
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80 "<p>", "</p>", "<h1>", "<h2>", |
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81 "<h3>", "<h4>", "<h5>", "<h6>", |
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82 "</h1>", "</h2>", "</h3>", "</h4>", "</h5>", |
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83 "</h6>", "<hr>", "<pre>", "</pre>" |
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84 }; |
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85 |
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86 /** |
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87 * Constructor |
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88 */ |
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89 DocLocale(DocEnv docenv, String localeName, boolean useBreakIterator) { |
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90 this.docenv = docenv; |
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91 this.localeName = localeName; |
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92 this.useBreakIterator = useBreakIterator; |
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93 locale = getLocale(); |
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94 if (locale == null) { |
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95 docenv.exit(); |
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96 } else { |
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97 Locale.setDefault(locale); |
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98 } |
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99 collator = Collator.getInstance(locale); |
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100 sentenceBreaker = BreakIterator.getSentenceInstance(locale); |
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101 } |
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102 |
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103 /** |
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104 * Get the locale if specified on the command line |
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105 * else return null and if locale option is not used |
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106 * then return default locale. |
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107 */ |
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108 private Locale getLocale() { |
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109 Locale userlocale = null; |
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110 if (localeName.length() > 0) { |
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111 int firstuscore = localeName.indexOf('_'); |
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112 int seconduscore = -1; |
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113 String language = null; |
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114 String country = null; |
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115 String variant = null; |
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116 if (firstuscore == 2) { |
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117 language = localeName.substring(0, firstuscore); |
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118 seconduscore = localeName.indexOf('_', firstuscore + 1); |
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119 if (seconduscore > 0) { |
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120 if (seconduscore != firstuscore + 3 || |
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121 localeName.length() <= seconduscore + 1) { |
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122 docenv.error(null, "main.malformed_locale_name", localeName); |
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123 return null; |
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124 } |
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125 country = localeName.substring(firstuscore + 1, |
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126 seconduscore); |
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127 variant = localeName.substring(seconduscore + 1); |
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128 } else if (localeName.length() == firstuscore + 3) { |
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129 country = localeName.substring(firstuscore + 1); |
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130 } else { |
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131 docenv.error(null, "main.malformed_locale_name", localeName); |
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132 return null; |
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133 } |
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134 } else if (firstuscore == -1 && localeName.length() == 2) { |
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135 language = localeName; |
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136 } else { |
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137 docenv.error(null, "main.malformed_locale_name", localeName); |
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138 return null; |
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139 } |
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140 userlocale = searchLocale(language, country, variant); |
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141 if (userlocale == null) { |
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142 docenv.error(null, "main.illegal_locale_name", localeName); |
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143 return null; |
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144 } else { |
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145 return userlocale; |
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146 } |
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147 } else { |
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148 return Locale.getDefault(); |
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149 } |
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150 } |
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151 |
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152 /** |
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153 * Search the locale for specified language, specified country and |
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154 * specified variant. |
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155 */ |
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156 private Locale searchLocale(String language, String country, |
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157 String variant) { |
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158 Locale[] locales = Locale.getAvailableLocales(); |
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159 for (int i = 0; i < locales.length; i++) { |
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160 if (locales[i].getLanguage().equals(language) && |
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161 (country == null || locales[i].getCountry().equals(country)) && |
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162 (variant == null || locales[i].getVariant().equals(variant))) { |
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163 return locales[i]; |
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164 } |
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165 } |
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166 return null; |
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167 } |
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168 |
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169 String localeSpecificFirstSentence(DocImpl doc, String s) { |
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170 if (s == null || s.length() == 0) { |
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171 return ""; |
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172 } |
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173 int index = s.indexOf("-->"); |
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174 if(s.trim().startsWith("<!--") && index != -1) { |
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175 return localeSpecificFirstSentence(doc, s.substring(index + 3, s.length())); |
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176 } |
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177 if (useBreakIterator || !locale.getLanguage().equals("en")) { |
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178 sentenceBreaker.setText(s.replace('\n', ' ')); |
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179 int start = sentenceBreaker.first(); |
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180 int end = sentenceBreaker.next(); |
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181 return s.substring(start, end).trim(); |
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182 } else { |
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183 return englishLanguageFirstSentence(s).trim(); |
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184 } |
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185 } |
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186 |
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187 /** |
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188 * Return the first sentence of a string, where a sentence ends |
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189 * with a period followed be white space. |
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190 */ |
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191 private String englishLanguageFirstSentence(String s) { |
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192 if (s == null) { |
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193 return null; |
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194 } |
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195 int len = s.length(); |
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196 boolean period = false; |
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197 for (int i = 0 ; i < len ; i++) { |
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198 switch (s.charAt(i)) { |
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199 case '.': |
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200 period = true; |
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201 break; |
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202 case ' ': |
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203 case '\t': |
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204 case '\n': |
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205 case '\r': |
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206 case '\f': |
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207 if (period) { |
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208 return s.substring(0, i); |
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209 } |
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210 break; |
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211 case '<': |
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212 if (i > 0) { |
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213 if (htmlSentenceTerminatorFound(s, i)) { |
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214 return s.substring(0, i); |
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215 } |
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216 } |
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217 break; |
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218 default: |
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219 period = false; |
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220 } |
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221 } |
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222 return s; |
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223 } |
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224 |
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225 /** |
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226 * Find out if there is any HTML tag in the given string. If found |
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227 * return true else return false. |
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228 */ |
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229 private boolean htmlSentenceTerminatorFound(String str, int index) { |
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230 for (int i = 0; i < sentenceTerminators.length; i++) { |
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231 String terminator = sentenceTerminators[i]; |
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232 if (str.regionMatches(true, index, terminator, |
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233 0, terminator.length())) { |
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234 return true; |
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235 } |
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236 } |
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237 return false; |
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238 } |
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239 } |